CAJ | 학술논문

文昌9区位于珠江口盆地文昌 A 凹陷六号断裂珠三南断裂带之间。古近系珠海组是主要储集层系，埋深基本大于3 km，为扇三角洲前缘潮坪相沉积储层，储层物性以低渗特征为主，局部发育中渗。为扩大勘探油气储量和后期合理有效开发，“甜点”储层寻找至关重要，笔者通过常规物性、测井解释、岩石薄片分析、二维核磁共振等，认识成岩相展布与储集层厚度、物性分布，综合沉积作用、成岩作用等，精细剖析珠海组低渗成因及储集厚度与物性差异发育的主控因素。研究表明：珠海组低渗特征形成的主要原因是压实作用，水下分流河道、潮道和砂坪微相为最有利储集相带，其次为混合坪，二者均可能形成“甜点”储层；压实程度偏弱、粒度较粗、溶蚀较强或绿泥石包壳发育区为潜在的“甜点”储层发育区，可确定六号断裂珠三南断裂带之间发育“甜点”储层；六号断裂带相近埋深，六号断裂带附近区域较远离区域更有利于“甜点”储层发育。
문창9구위우주강구분지문창 A 요함륙호단렬주삼남단렬대지간。고근계주해조시주요저집층계，매심기본대우3 km，위선삼각주전연조평상침적저층，저층물성이저삼특정위주，국부발육중삼。위확대감탐유기저량화후기합리유효개발，“첨점”저층심조지관중요，필자통과상규물성、측정해석、암석박편분석、이유핵자공진등，인식성암상전포여저집층후도、물성분포，종합침적작용、성암작용등，정세부석주해조저삼성인급저집후도여물성차이발육적주공인소。연구표명：주해조저삼특정형성적주요원인시압실작용，수하분류하도、조도화사평미상위최유리저집상대，기차위혼합평，이자균가능형성“첨점”저층；압실정도편약、립도교조、용식교강혹록니석포각발육구위잠재적“첨점”저층발육구，가학정륙호단렬주삼남단렬대지간발육“첨점”저층；륙호단렬대상근매심，륙호단렬대부근구역교원리구역경유리우“첨점”저층발육。
Zhuhai Formation is the major reservoir in ,Wenchang 9 area between the No.6 Fault and the South Fault of Wenchang A depression,which deeply buried over 3 km.It is the rontal subfacies of fan delta.The reservoir properties are low permeability mainly.In order to expanding the prospecting for oil and gas reserves and later the reasonable and effective development,diagenetic facies and the distribution of reservoir thickness and physical properties are recognized by normal physical characteristics,logging interpretatio,analysis of rock thin and two dimensional nuclear magnetic resonance.The reasons of low permeability formation and factors of reservoir thickness and physics quality are analysed finly from sedimentary facies and diagenesis.It is determined that compaction is the main reseron to low permeability.The most favorable Sedimentary facies are underwater distributary channel,tidal channel,sand flat,the second is the mixed flat.All of them can form “sweet spots”reservoir.Less compaction, coarse grain size,the dissolution stronger intensity or chlorite grain-coatings are the areas of “sweet spots”reservoir.The area between the fault zone 6 to the South fault zone of weaker compaction is “sweet spots”reservoir zone.The zones near the fault are more favorable to sweet spots than the zones further away from the sixth fault with similar depth.